Hello i am working on a project the last year now but the lack of knowledge on electronics probably creats the most of my problems. i have allready finished with the rest of my project but now i want to sent a string of 24 chars with ultrasounds from one port from my arduino mega and receive it to a…

morse code through ultrasounds !!!!!!!!

CrossRoads October 22, 2012, 8:19pm 6

Sure. You want a signal from 0-0.5V for a Low and 3.5-5V for a High.

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